<template>
  <ul class="todo-main">
    <li
      v-for="(todo, index) in todoList"
      :key="todo.id"
      :class="{ active: enterIndex === index }"
      @mouseenter="enterIndex = index"
      @mouseleave="enterIndex = -1"
    >
      <label>
        <input type="checkbox" :checked="todo.done" />
        <span>{{ todo.thing }}</span>
      </label>
      <button class="btn btn-danger">删除</button>
    </li>
  </ul>
</template>

<script>
export default {
  name: "List",
  props: ["todoList"],
  data() {
    return {
      enterIndex: -1,
    };
  },
};
</script>

<style scoped>
/*main*/
.todo-main {
  margin-left: 0px;
  border: 1px solid #ddd;
  border-radius: 2px;
  padding: 0px;
}

.todo-empty {
  height: 40px;
  line-height: 40px;
  border: 1px solid #ddd;
  border-radius: 2px;
  padding-left: 5px;
  margin-top: 10px;
}
/*item*/
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li.active {
  background: #ccc;
}
li.active .btn {
  display: block;
}

li label {
  float: left;
  cursor: pointer;
}

li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li button {
  float: right;
  display: none;
  margin-top: 3px;
}

li:before {
  content: initial;
}

li:last-child {
  border-bottom: none;
}
</style>
